﻿using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net.Mail;
using System.Net.Mime;
using System.Text;
using System.Threading.Tasks;

public class MyEmail
{
	private MailMessage mMailMessage;   //主要处理发送邮件的内容（如：收发人地址、标题、主体、图片等等）
	private SmtpClient mSmtpClient; //主要处理用smtp方式发送此邮件的配置信息（如：邮件服务器、发送端口号、验证方式等等）
	private int mSenderPort;   //发送邮件所用的端口号（htmp协议默认为25）
	private string mSenderServerHost;    //发件箱的邮件服务器地址（IP形式或字符串形式均可）
	private string mSenderPassword;    //发件箱的密码
	private string mSenderUsername;   //发件箱的用户名（即@符号前面的字符串，例如：hello@163.com，用户名为：hello）
	private bool mEnableSsl;    //是否对邮件内容进行socket层加密传输
	private bool mEnablePwdAuthentication;  //是否对发件人邮箱进行密码验证

	///<summary>
	/// 构造函数
	///</summary>
	///<param name="server">发件箱的邮件服务器地址</param>
	///<param name="toMail">收件人地址（可以是多个收件人，程序中是以“;"进行区分的）</param>
	///<param name="fromMail">发件人地址</param>
	///<param name="subject">邮件标题</param>
	///<param name="emailBody">邮件内容（可以以html格式进行设计）</param>
	///<param name="username">发件箱的用户名（即@符号前面的字符串，例如：hello@163.com，用户名为：hello）</param>
	///<param name="password">发件人邮箱密码</param>
	///<param name="port">发送邮件所用的端口号（htmp协议默认为25）</param>
	///<param name="sslEnable">true表示对邮件内容进行socket层加密传输，false表示不加密</param>
	///<param name="pwdCheckEnable">true表示对发件人邮箱进行密码验证，false表示不对发件人邮箱进行密码验证</param>
	public MyEmail(string server, string toMail, string fromMail, string subject, string emailBody, string username, string password, string port, bool sslEnable, bool pwdCheckEnable)
	{
		try
		{
			mMailMessage = new MailMessage();
			mMailMessage.To.Add(toMail);
			mMailMessage.From = new MailAddress(fromMail);
			mMailMessage.Subject = subject;
			mMailMessage.Body = emailBody;
			mMailMessage.IsBodyHtml = true;
			mMailMessage.BodyEncoding = System.Text.Encoding.UTF8;
			mMailMessage.Priority = MailPriority.Normal;
			this.mSenderServerHost = server;
			this.mSenderUsername = username;
			this.mSenderPassword = password;
			this.mSenderPort = Convert.ToInt32(port);
			this.mEnableSsl = sslEnable;
			this.mEnablePwdAuthentication = pwdCheckEnable;
		}
		catch (Exception ex)
		{
			Console.WriteLine(ex.ToString());
		}
	}

	///<summary>
	/// 添加附件
	///</summary>
	///<param name="attachmentsPath">附件的路径集合，以分号分隔</param>
	public void AddAttachments(string attachmentsPath)
	{
		try
		{
			string[] path = attachmentsPath.Split(';'); //以什么符号分隔可以自定义
			Attachment data;
			ContentDisposition disposition;
			for (int i = 0; i < path.Length; i++)
			{
				data = new Attachment(path[i], MediaTypeNames.Application.Octet);
				disposition = data.ContentDisposition;
				disposition.CreationDate = File.GetCreationTime(path[i]);
				disposition.ModificationDate = File.GetLastWriteTime(path[i]);
				disposition.ReadDate = File.GetLastAccessTime(path[i]);
				mMailMessage.Attachments.Add(data);
			}
		}
		catch (Exception ex)
		{
			Console.WriteLine(ex.ToString());
		}
	}

	///<summary>
	/// 邮件的发送
	///</summary>
	public void Send()
	{
		try
		{
			if (mMailMessage != null)
			{
				mSmtpClient = new SmtpClient();
				//mSmtpClient.Host = "smtp." + mMailMessage.From.Host;
				mSmtpClient.Host = this.mSenderServerHost;
				mSmtpClient.Port = this.mSenderPort;
				mSmtpClient.UseDefaultCredentials = false;
				mSmtpClient.EnableSsl = this.mEnableSsl;
				if (this.mEnablePwdAuthentication)
				{
					System.Net.NetworkCredential nc = new System.Net.NetworkCredential(this.mSenderUsername, this.mSenderPassword);
					//mSmtpClient.Credentials = new System.Net.NetworkCredential(this.mSenderUsername, this.mSenderPassword);
					//NTLM: Secure Password Authentication in Microsoft Outlook Express
					mSmtpClient.Credentials = nc.GetCredential(mSmtpClient.Host, mSmtpClient.Port, "NTLM");
				}
				else
				{
					mSmtpClient.Credentials = new System.Net.NetworkCredential(this.mSenderUsername, this.mSenderPassword);
				}
				mSmtpClient.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;
				mSmtpClient.Send(mMailMessage);
			}
		}
		catch (Exception ex)
		{
			Console.WriteLine(ex.ToString());
		}
	}
}
